Eyeglass-mounting.



L. YF. Am.

` EYEGLASS MOUNTING.

VAPPLVICMION FILED DEC. 30. 1915.

5 l fly@ *8 .6J il Patente Feb, 29g

LEO F. ADT, OF ALBANY, NEW YORK.

EYEGLASS-MOUNTING.

Specification of Letters Patent.

Patented Feb. 29, 1916.

Application filed December 30, 1915. Serial No. 69,319.

T all whom it may concern Be it known that I, Luo F. ADT, of Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Eyeglass-Mountings; and I .do hereby declare the following to be a full, clear, and exact description of the same,

' reference being had .to the accompanying drawings, forming a part of this specification, and to the reference-numerals marked thereon.

My present invention relates to eyeglasses and more particularly to eyeglasses of the finger-piece type in which two guard levers disposed transversely of the bridge or support carry at theirrear ends nose engaging pads or guards and at their forward ends are provided with finger grips which, when pinched together, spread the nose pads land disengage them from the nose. The pads, through the medium of thel levers, are normally pressed together to grip springs acting against the guard levers and reacting against the support and this invention has to do with structures in which the springs are arranged upon supporting and centering projections and it is desired that they be rather freely removable and replaceable over the free ends of suchprojections.

The invention has for its object .to provide, with due regard to considerations of manufacturing economy and convenience, a simple and convenient means for retaining the springs upon their projections, which means will also act as the abutment for taking the thrust of the spring against the support. A particular construction of the spring also enters into the combination in its mode of cooperation with its retaining means.

To these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification. A

In the drawings: Figure 1 is a top plan view of one guard lever unit of a fingerpiece eyeglass mounting constructedin accordance with and illustrating one embodiment of my invention, only fragments of the lens and bridge being sho-wn and the parts being represented on anenlarged scale; Fig. 2 is a bottom plan View; Fig. 3 is an inner side view looking toward the lens of one-half of the mounting, the bridge being broken rights and the nose by.

away; Fig. L is a bottom plan View showing the guard lever in position to release the nose bearing pad from the nose; Fig. 5 is a front view of the bridge end and support to illustrate the pivot -member and the spring centering projection, the spring and guard lever being removed, and Fig. 6 is a detail perspective view of the spring taken from below.

Similar reference numerals throughoutgthe several figures indicate the same partsf I have illustrated andwill describe only one guard lever unit at one end of the bridge, it being well known that the same structure is duplicated at the other end lexcept for lefts and the description will hence be in the singular. In this view, l indicates theusual rigid bridgeand 2 and 3 the edge and face lens strapsv carried thereby and by means of which the lens il is rigidly l connected to the bridge. Intermediate the central o-r curved portion of the bridge and the straps is a substantially horizontal enlargement 5 forming a table on which the guard lever and .its attendant mechanism is carried. The guard lever indicated generally at 6, has a suitable finger-piece 7 at its forwardly projecting end and 8 indicates any desired form of nose pad carried bythe rear end of the lever. The pivot 9 of the lever may and does, in this instance, consist of a shouldered screw threaded into the support 5 and having an overhanging or enlarged head l0 between which and thesupport the lever is confined to vibrate in a fixed horizontal plane.

Beneath the bridge table or support 5 and fixed thereto is a downwardly extending vertical post or projection 11 which is `in alinement with the pivot 9 and hence with the axis upon which the guard levaer turns. The projection may be tubular as shown to receive the pivot screw or a part of it and at its lower or free extremity it has an over'- hanging rim portion or shallow shoulder 12 and at one side, preferably the side toward the bridge, there is built onto this shoulder a laterally projecting lug 18 that is flush with the end face of the centering projection.

The actuating spring, shown in detail in Fig. 5, is preferably of the flat spiral type and composed of a fiat ribbon of metal wound into a coil with the outer end 14 extending outwardly at a tangent to hook the rearward arm of the guard 11. The spring encircles the `tube or projection 11 and on its inner extremity itis provided with a downward extension 16 parallel withv vwhen in place, the end of the inner coil hugs the projection but without cramping the iexing movements of the spring as a whole. As the end 14 is engaged with the arm of the guard lever 6, the projection 16 automatically rotates into engagement with the side of the lug 13 and it will be noted that bypositioning the lug as shown and described, it directly engages the outer arm or end of the spring which is the part of the latter most liable to be deflected from its true plane and holds it in position. To

' remove the spring, the described motions arek reversed, that is, the outer arm is first disengaged from the guardlever and that side of the coil which is opposite the lug 13 is then first raised.

It will be noted that the shallow rim or shoulder 12 not only assists in holding the spring in place, but is a strengthening fac-y tor' in the formation of the lug V jection being, as stated, preferablv tubular4 13, the proand very thin. 'It Will be further noted that there are no abrupt bends in the spring at any point and no bends at all at the inner Copies ofth1s patent may be obtained for ve cents each, by addressing the end where a bend in the material is most liable to result in breakage. The projection 16 x is symmetrically continuous with thecurve of the inner convolution and need not be made by bending the inner extremity but is *preferably formed integrally and rolled outy along with the body of the ribbon.

I Vclaim as my invention:

1. In a linger-piece eyeglass mounting, the combination with a support and a guard lever pivoted to turn thereon, ofa centering projection rigidly carried by one of said parts in alinementayvith the axis of the lever and provided with!` a lateral abutment atv its outer end and a coil spring surrounding the projection and adapted to be applied and removed over the end thereof and over the abutment, one end ofthe spring being provided with an axial extension interlocking with the abutment and the other being arranged to act against the other part.

2. In a linger-piece eyeglass mounting, the combination with a support and a guard lever pivoted to turn on one sidethereof, of a centering projection fixed to theother side of the support in alinement witlnthe axis ofthe lever and havingiat-it's outer or free end a lateral lug and a flat spiral spring Surrounding thel projection and I adapted'to be applied and removed over the free end thereof, the inner end -of the spring being provided with a downward extension parallel with the centering'projection and lying against the same to engage 'the`1ug, the outer end of the spring being arranged to act against t e guard lever.

LEO F. ADT.-

Witnesses:

RssnLL B. GRIFFITH, HARRIET T. VAY.

Commissioner of Patents.

Washington, D. C. 

